Ti-6Al-4V is one of the most promising alloys for electron beam melting (EBM) of structural parts due to its outstanding properties and its extensive use in the aerospace, automotive, and energy industries. In this study, we report a detailed and systematic micromechanical characterization of additively manufactured Ti-6Al-4V parts produced via EBM. The specimens were characterized by microhardness, nanoindentation, micropillar compression, and microscratch measurements. The results show that the Ti-6Al-4V exhibits a strong indentation size effect and higher strain rate sensitivity compared to those obtained from macroscale measurements. The high scratch resistance and the high hardness of the alloy at small indentation depths suggest that the EBM-produced Ti-6Al-4V parts can provide good performance in service under sliding wear conditions.

Ti-6Al-4V 因其优异的性能和在航空航天、汽车和能源工业中的广泛应用而成为最有前途的结构件电子束熔炼 (EBM) 合金之一。在这项研究中，我们报告了通过 EBM 生产的增材制造 Ti-6Al-4V 零件的详细和系统的微机械表征。通过显微硬度、纳米压痕、微柱压缩和微划痕测量对样品进行表征。结果表明，与从宏观测量中获得的结果相比，Ti-6Al-4V 表现出强烈的压痕尺寸效应和更高的应变率敏感性。合金在小压痕深度下的高抗划伤性和高硬度表明，EBM 生产的 Ti-6Al-4V 零件可以在滑动磨损条件下提供良好的使用性能。